The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A189498 T(n,k)=Number of arrangements of n+1 nonzero numbers x(i) in -k..k with the sum of floor(x(i)/x(i+1)) equal to zero 16
 0, 2, 4, 6, 12, 0, 12, 38, 42, 12, 20, 78, 152, 136, 0, 30, 148, 462, 928, 550, 40, 42, 240, 1088, 3388, 4920, 1892, 0, 56, 380, 2128, 9394, 24806, 27508, 7384, 140, 72, 554, 3850, 22088, 85480, 182634, 152358, 26816, 0, 90, 788, 6474, 45892, 238836, 787412 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Table starts ...0......2........6........12.........20..........30...........42...........56 ...4.....12.......38........78........148.........240..........380..........554 ...0.....42......152.......462.......1088........2128.........3850.........6474 ..12....136......928......3388.......9394.......22088........45892........86416 ...0....550.....4920.....24806......85480......238836.......567774......1218778 ..40...1892....27508....182634.....787412.....2642358......7269852.....17692662 ...0...7384...152358...1350418....7250142....29261538.....93830584....260746932 .140..26816...852940..10077438...67449574...326423068...1218634086...3870426602 ...0.103288..4796962..75593372..630466648..3664621084..15936391068..57837221756 .504.386928.27117826.569975518.5926141678.41363200538.209537582772.869215927390 LINKS R. H. Hardin, Table of n, a(n) for n = 1..797 EXAMPLE Some solutions for n=7 k=5 .-5...-5...-5...-5...-5...-4...-5...-5...-5...-4...-5...-5...-5...-5...-5...-5 .-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5...-5 ..3...-4....5....2....3...-4....4...-4...-3...-5....5....5....1....1....3....3 .-4....3...-4...-3....2...-3....3....5....1...-3...-4....2....4....2....1....2 .-2....2...-1...-4...-1...-5....1....4....1...-4...-2...-5....2....2...-1....5 ..4....5...-3....4...-5...-2...-2....3....2...-5....2....3...-5...-4...-5...-5 ..3...-2....2....2...-4....5...-4...-1....2....3....3....5...-5...-1....3...-2 ..5...-1....5....1...-4...-2....3...-4...-4....4....3....5...-2...-4....3....2 CROSSREFS Column 1 is A028329(n/2) for even n Row 1 is A002378(n-1) Sequence in context: A056763 A347474 A190071 * A129567 A064469 A057700 Adjacent sequences:  A189495 A189496 A189497 * A189499 A189500 A189501 KEYWORD nonn,tabl AUTHOR R. H. Hardin Apr 23 2011 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 7 13:08 EST 2021. Contains 349581 sequences. (Running on oeis4.)